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Alpina won't sell its 600-hp B6 Bi-Turbo in the US

Like the B5 Bi-Turbo revealed last month, the newest version of Alpina's B6 packs an upgraded 4.4-liter twin-turbo V8 now good for 600 horsepower and 590 pound-feet of torque. The result is a 0-62 time of 4.2 seconds and a top speed of 205 miles per hour, giving it similar acceleration to the M6 but a much higher top speed. Other enhancements include a sport suspension with adjustable dampers, a limited-slip differential, fully retrimmed interior, and an available brake upgrade. These are essentially the same upgrades applied to the Edition 50 that helped Alpina celebrate its half-century anniversary. But with those all sold out, the enhancements will now be available to European customers on the standard B6 – in either coupe or convertible form – starting in the spring, with prices comparing roughly to those of the M6. Unfortunately, the two-door B6 isn't available Stateside, but we can get the B6 xDrive Gran Coupe with the same output. With four driven wheels and four doors, the US-market B6 will rocket to 60 in an estimated 3.6 seconds and reach an electronically limited top speed of 200 mph – if only we had the derestricted highways to test that out. Related Video: BMW ALPINA B6 BI-TURBO WITH UPDATED 4.4 LITRE V8 BI-TURBO • V8 Bi-Turbo producing 441 kW (600 hp) and 800 Nm of torque • BMW ALPINA B6 Bi-Turbo Coupe accelerates from 0 to 100 km/h in just 4.2 seconds • Significantly extended standard equipment A limited number of fifty units of the BMW ALPINA B6 Bi-Turbo EDITION 50 were produced for our customers. Created and developed to celebrate ALPINA's 50th Anniversary in 2015, these vehicles all exhibit unique features sourced from ALPINA's long and eventful heritage. Like limited edition models of the past, the popularity of the EDITION 50 means all examples have been placed with customers. The regular version of the BMW ALPINA B6 Bi-Turbo Coupe and Convertible will continue to be available in spring 2016 and featuring the updated engine and drivetrain configuration. The powerful 4.4 litre V8 Bi-Turbo has been developed further, increasing output to 441 kW (600 hp) and 800 Nm of torque. The BMW ALPINA B6 Bi-Turbo Coupe accelerates from 0 to 100 km/h in 4.2 seconds, onto a top speed of 330 km/h. Combined consumption according to ECE Norm remains at 9.4 l/100km and 219 g/km CO2. The ALPINA sport suspension with Adaptive Drive comprises electronically adjustable dampers and active roll stabilisation.

Automakers' sound systems: Crank it, don't yank it

Years ago, one of the first things most music lovers did after buying a new vehicle was drive to an aftermarket stereo shop to get the crappy stock components swapped for better gear. And you'd typically get not only better sound but also more bang (and boom) for your buck. But in the past decade or so, the overall quality of OEM audio has dramatically increased, while car electronics became more complex, removing the incentive for most new vehicle owners — and all but the most hardcore DIYer — to start from scratch. In 2010, I did a comparison of the average costs for OEM electronics vs. similar offerings from the aftermarket, and back then automakers' stock premium systems were by far the best bargain — and are probably an even better value now. The premium 14-speaker, 1,200-watt JBL system in the all-new 2019 Toyota Avalon is a prime example of this trend. It's standard on the top two Limited and Touring trims and is available as a $680 audio upgrade on the XLE and XSE. I doubt you can even buy 14 speakers and 1,200 watts of amplification from the aftermarket for 700 bucks, much less have it all installed. And because the system is bundled with Toyota's Entune infotainment system, Apple CarPlay and a surround-view camera, removing the head unit means you would likely lose these features. Another advantage of OEMs and their audio partners is they can design the car around the audio system. In the past, automakers would typically place speakers where convenient for packaging, not for optimal sound reproduction, and audio engineers were forced to compromise. But as with the Avalon's premium JBL audio system, this is starting to change. At a recent behind-the-scenes peek for media into the process of developing the system, Toyota and Harman engineers delved into the minutia of sealing the inner panel of the front doors to create an enclosure for 6x8-inch woofers, making space in the pillars for JBL horn tweeters and extensively measuring the acoustic properties of the interior to tune the sound to the space. I'm met some creative and skilled car stereo installers, but none with a degree in psychoacoustics. The system is also the first to feature Quantum Logic Surround that creates a multi-channel listening experience from two-channel sources. And it includes Harman's Clari-Fi processing that "rebuilds key details lost" in compressed audio formats used by streaming music services and MP3s.

BMW reveals Concept Compact Sedan in Guangzhou

While our eyes were fixed on Los Angeles, BMW turned its attention to Guangzhou, China, where the German automaker unveiled the Concept Compact Sedan. The show car envisions a Bavarian rival to the likes of the Mercedes-Benz CLA-Class and Audi A3 sedan. Munich released little in the way of technical details. Instead, the Concept Compact Sedan is all about the design. Relative to its form, the show car rides on a long wheelbase, with the wheels pushed to the corners, and a greenhouse set back behind a long hood. The details are distinctly Bimmer, from the signature double-kidney grille to the Hofmeister kink in the C-pillar. The horizontal lines of the front and rear fascias are designed to maximize the vehicle's visual width, and the muscular design integrates touch-sensitive door handles below the swage line for a cleaner look. All that is rendered in liquid metal bronze paint, offset by polished aluminum brightwork and 20-inch split-spoke alloys. Geared towards the "life of a generation of youth in China," the interior is designed around the driver, but also seeks to maximize rear-seat space despite the vehicle's compact footprint. The horizontal treatment continues inside to give the impression of space, with upscale materials like three-tone Nappa leather, open-pore wood, and brushed aluminum trim with orange accents and ambient lighting. All the auxiliary surfaces are controlled by touch panels on the steering wheel, center stack, center console, and door handles. There's a panoramic roof, a head-up display for the driver, and an 8.8-inch screen in the dashboard. The sum total is a compelling preview of what a four-door addition to the 1 Series and 2 Series could look like. And to our eyes, it looks like it would be just as home on American roads as it would be in China, Europe, or anywhere else for that matter. Check it out in the high-res image gallery above and the details in the press release below. BMW Concept Compact Sedan. Sporty, elegant, exclusive – the perfect statement-maker. 20.11.2015 Munich/Guangzhou. The BMW Group has chosen Auto Guangzhou 2015, one of the largest international motor shows in China, to present a very special new development to the global public: the company's vision of a four-door sedan for the compact segment. "The BMW Concept Compact Sedan reveals the potential we see in a compact sedan," says Adrian van Hooydonk, Senior Vice President BMW Group Design.